Later, in Zhou Dynasty, King Wen of Zhou added a sixth string for his son.

后来到了周朝，周文王为儿子加了第六弦。

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In the Zhou dynasty, King Wen of Zhou added a sixth string for his son King Wu of Zhou to encourage his army to fight with the Shang.

周文王为他的儿子周武王增加了第六根琴弦，鼓励他的军队与商朝作战。

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Among the ancients there was one who acted on this principle, namely king Wen.

古之人有行之者，文王是也。

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As such, I could see WEN spiking on strong sales or further stumbles by rival (and now No. 3) Burger King.

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